305,253 research outputs found
Tecniche lineari e azimutali nelle indagini Ground Penetrating Radar per l’individuazione di sottoservizi in aree urbane
No full textCaracterização de genes codificadores de entomotoxinas de Photorhabdus luminescens subsp. akhurstii.
No full textUm isolado nativo da bactéria Photorhabdus luminescens (linhagem IB01) simbionte de nematóides do gênero Heterorhabditis foi identificada como Photorhabdus luminescens subsp. akhurstii. Através da comparação de genes tccC e tcdA da linhagem IB01 com os de outras já estudadas verificou-se a presença de genes semelhantes aos genes tcdA1, tcdA2, tcdA3, tcdA4, tccC1, tccC2 e tccC3 do isolado W14 de P. luminescens e tccC6 do isolado TT01. Os genes tcdA1 e tcdA4 de IB01 foram clonados em Escherichia coli e totalmente seqüenciados. Foi construído um vetor para otimização da expressão do gene tcdA1 em bactérias. Foi produzida uma biblioteca genômica e os cosmídeos contendo genes tcdA foram identificados. A toxicidade oral e injetável da linhagem IB01 e de clones de E. coli contendo genes da mesma foi testada contra larvas dos insetos Galleria mellonella L. e Diatraea saccharalis (Fabr.).Tese (Doutorado em Biotecnologia) - Universidade de São Paulo, São Paulo. Orientador: Itamar Soares de Melo, Embrapa Meio Ambiente
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Devozioni e sentimento religioso di un aristocratico in carcere. Giovanni Marsiglio Pio nel Castelvecchio di Ferrara
No full textGiovanni Marsiglio Pio, esponente della più potente famiglia di Carpi, fu recluso in carcere per circa otto anni perché accusato, insieme ad altri suoi parenti, di aver congiurato contro Borso d'Este. In questo periodo ebbe modo non solo di registrare in una sorta di diario, fra l'altro, i doni ricevuti e le persone incontrate, ma anche di scrivere versi poi raccolti in un Canzoniere. Si intende qui valorizzare questi documenti e arricchire così il dossier delle testimonianze di religiosità carceraria tardomedievale, con un caso abbastanza particolare: quello di un prigioniero di alto lignaggio custodito in una prigione speciale, che comportava una dura restrizione di libertà, ma con modalità alquanto diverse rispetto a quelle delle carceri comunali delle città bassomedievali italiane
Elevated serum progesterone on the day of HCG administration in IVF is associated with a higher pregnancy rate in polycystic ovary syndrome
No full textOur study compared 84 patients with polycystic ovary syndrome (PCOS) with 84 control patients who had normal ovaries and who were matched for the main determinants of success in in-vitro fertilization (IVF) and embryo transfer. Serum concentrations of oestradiol and progesterone on the day of human chorionic gonadotrophin (HCG) injection were significantly higher in PCOS than in normal patients (oestradiol 2016 +/- 1.8 pg/ml versus 1456 +/- 40.9 pg/ml, P or = 1.2 ng/ml showed a higher pregnancy and miscarriage rate than PCOS patients with progesterone < 1.2 ng/ml (26.6 versus 17.9%, P < 0.01; and 41.7% versus 14.3%, P < 0.01 respectively). These findings suggest that premature progesterone production does not have an adverse effect on pregnancy rate in PCOS, but on the contrary, may be a predictor for success in IVF/embryo transfer
ESSAYS ON ECONOMIC GROWTH: TECHNICAL PROGRESS, POPULATION DYNAMICS AND THE ENVIRONMENT
No full textThis thesis analyzes economic growth and how this is related to diff erent issues, namely technical progress, population change and environment. It studies each of these issues in a separate paper. The choice of these issues has been driven by their growing importance in the analysis of the development process of modern economies. Technological progress, jointly with the accumulation of human capital, is one of the most relevant causes of the consistent growth showed in the last century by industrialized countries; therefore, it is important to understand what are its features in order to promote further technical improvements. Demographic growth has dramatically changed during and after the transition from stagnation (before the industrial revolution) to growth (after that): fertility and mortality rates have dropped and many economies now show a rate of population growth just over the replacement one; studying the implications of population change for economic growth can be really important in order to understand whether population policies can be necessary or not for the economy. The environment is an important source of welfare services to people and just in the last decades such a fact has been widely recognized: this is due to the fact that as the economy reaches a certain level of development, its agents feel the importance of some aspects which in a previous phase they did not care about; human activity is the main source of environment degradation and an increasing need for the policy makers to understand how regulating it has arisen. As it may be clear, these topics are crucially interrelated: population growth a ffects technical progress (through the number of researchers employed in R&D activity) and the environment (through the necessity of satisfying the needs of a larger population, in terms of consumption demand and waste production), while technical progress a ffects the environment (switching from polluting to clean technologies such an e ffect can crucially change)
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
Metodi di indagine Ground Penetrating Radar per l’individuazione e la caratterizzazione d itarget lineari nel sottosuolo
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